Cyanide tank



Nov. 3, 1925.

Gf E. C. ROUSSEAU 2 Sheets-Sheet l Original Filed Nov. 20, 1923 fluor nu,

Nov 3' G. E. C. ROUSSEAU CYANIDE TANK Original Filed Nov. 20. 1923 2 Sheets-Shev 2 arrows".

Patented Nov. 3, 1925.

UNITED STATES GEORGE E. C. ROUSSEAU, 0F SACRAMENTO, CALIFORNIA.

oYi-iiviiin TANK.

Application led November 20, 1923, Serial No. 675,885.

To f/ZZ @07mm t 77mg/ concer/n Be it known that I, Grouse E. C. RoussnAU, a citizen of the United States, residing at Sacramento, in the county of Sacramento, State of California, have invented certain new and useful Improvements in Cyanide Tanks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in devices for saving precious metals from ores, and particularly to devices for extracting gold.

One object of the invention is to provide a device by means of which the gold may be properly cyanided, before being finally washed.

Another object is to provide a cyaniding tank by means of which the materials therewithin Vmay be properly and Y effectively circulated, so that the cyanide may more intimately absorb the gold particles from the slinies.

Other objects and advantageswill be apparent from the following description when taken in connection with the accompanying drawings.

In the drawings:

Figure 1 is a side elevation of a cyanide tank made in accordance with the present invention. t t

Figure 2 is a vertical sectional view through the tank, the interior mechanism being in elevation.

Figure 3 is a horizontal sectional view on the line 3 3 of Figure 1.

Figure 4 is a vertical sectional view through the tank, the interior mechanism being also in section.

Referring particularly to the accompanying drawings, 10 represents a suitable support on which is mounted the vertical tank 11, which has the tapering bottom 12 formed with the opening 13 in its apex. Embracing the apex of the bottom of the tank is a casting 14 through the center of which is formed an opening 15 for the reception of the vertlcal pipe 16, which also extends upwardly through the opening 13, to a point adjacent the upper end of the tank. Mounted on the upper end of the pipe 16 is a pump cylinder 17, having a flap valve 18 in its lower end which is seated on the upper end of the said pipe. An upwardly dished platform 19 is Renewed January 12, 1925.

which have their lower ends secured tothe pipe 16. The lower end of the pipe 16, with-- in the apex of thebottom of the tank, is formed with a plurality of openings 22,v to which reference will be more particularly made later herein. In the pipe 16, below the apex of the bottom of the tank, there is mounted a valve 23, which is arranged to maintain the materials within the tank while the cyaniding process is in operation, and for discharging the contents when the process is completed.

Disposed within the cylinder 17, for reciprocatory movement, is a piston or plunger 24, to the upper end of which is connected a pistonV rod 25. Formed integrally with the spider portion 24,ofthe plunger, and depending centrally therefrom, is a' hollow stern 26, and slidable vertically in this stem is the stem 27 of the valve 28. The plunger 24 is formed with a seat 29 on which the' valve seats, the stem 26 serving as a guide for the vertical movements of the valve. Gn the upper end of the tank 11 there is disposed a removable air-tight cover 30, through the center of which the piston rod 25 is slidably arranged. Mounted above the cover 30 is a drive shaft 31, on which is mounted an eccentric disk 32 to which the upper end of the rod 25 is connected by the pivoted link 33. Associated with the eccentric is a large gear 34, driven by a smaller gear 35, which latter gear is mounted on a counter-shaft 36, adjacent the shaft 31.

The slinies and the solution of cyanide are run into the tank, from the'concentrating table, and then the cover 30 tightly fitted on the tank, after which the shafts 31 and 36 are set in motion to cause the reciprocation of the plunger 24, within the cylinder 17. The upward movement of the plunger causes the seating or closing of the valve 28, which produces suction in the cylinder,

with the result that the valve 18 will openv and permit the materials to be drawn up-' wardly through the pipe 16. As the piston or plunger descends the valve 18 is forced into closed position,'while the force of the materials causes the valve 28 to rise from its seat, resulting in the materials passing upwardly through the plunger and out onto the dished platform, from whence they fall into the tank. The rapid reciprocations of the plunger cause the materials to be drawn upwardly through the pipe 16, in a constant stream, to be discharged onto the platform 19, and then returned to the tank, resulting in the thorough circulation of the materials, and the proper action of the cyanide solution upon the ore and the gold therein. 1t will be readily understood that the heavier particles are precipitated to the bottom oi the tank and pass out through the openings 22, while the lighter particles remain on the surface oi' the liquid in the tank. Between the casting 14 and the apex of the bottom or the tank there is disposed a packing 37 which prevents leakage of any or' the materials from the tank.

Tvvhat is claimed is:

1. A cyaniding device comprising a closed tank having a tapered bottom, a vertical pipe disposed through the tapered bottom and extending to apoint adjacent the upper end oi: thetank, the pipe being perforated immediately above the bottom, a

pump cylinder mounted on the upper end oiC the pipe, a valve in the upper end of the pipe, and a short stroke piston reciprocable in the cylinder and having a central opening and an upper cage portion, the opening having a valveA seat, a Vvalve guided in the cage portion toward and away from the valve seat, and means` for reciprocating the piston within the cylinder.

2. A cyaniding device comprising a. tank, a pipe extending longitudinally and centrally within the tank and being perforated immediately above the bottom oi' the tank, a pump mounted on the upper end oi the pipe and having a short stroke piston therein, a truncated cone-shaped wall surrounding the upper end of the pump, a collar on the intermediate portion of the pipe and having an outwardly and upwardly extending flange, and braces connected to the flange and to the periphery ot the said wall. Y Y

3. A cyaniding device including a tank, a vertical pipe within the tank and having communication at its lower end with the interior of the tank, a pump cylinder having a tapered bottom portion connected with the upper end of the pipe, a valve in said end of the pipe, a short stroke valved piston reciprocable in the upper portion of the pump cylinder, a cover on the upper portion of the tank, and means on the cover and connected with the piston for reciprocating the lat-ter within the upper portion of the cylinder. Y

In testimony whereof, I aiiix my signature.

GEORGE E. C. ROUSSEAU. 

